Manufacture of barbed strips for fences



(No Model.)

S. H. GREGG.

MANUFACTURE OF BARBED STRIPS FOR FENCES.

No. 258,412. Patented May 23, 1882 NVENTOR ATTORNEYS.

WITNESSE$ UNITED STATES ara'm FFICE.

SAMUEL H. GREGG, OF GRAWFORDSVILLE, INDIANA.

MANUFACTURE OF BARBED STRIPS FOR FENCES.

SPECIFICATION forming part of Letters Patent No. 258,412, dated May 23,1882.

Application filed February 6, 1882. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL H. GREGG, of Crawfordsville, in the county ofMontgomery and State of Indiana, have invented a new and usefulImprovement in the Manufacture of Barbed Metallic Corrugated Strips forFencing; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure 1 is a side elevation of a pair of rolls having oval grooves.Fig. 2 is a like view, showing recesses for forming the barbs. Fig. 3 isa cross-section of the oval rod, showing the barbs. Fig. 4 is a sideelevation of a pair of rolls having square grooves. Fig. 5 is atransverse section of a pair of corrugated rolls, and Fig. 6 shows aplan and side view of the finished barbed and corrugated strip.

My invention relates to improvements in the manufacture of barbedmetallic corrugated strips for fencing; and it consists, first, in thepeculiar construction of the rolls, whereby each strip, with its barbs,is formed in one piece. My invention further consists in the generalprocess, whereby a round bar of metal is converted into a barbedmetallic strip of peculiar construction by passing it through a seriesof peculiarly-constructed rolls; and my invention finally consists ofthe barbed metallic corrugated fencing-strip, produced as hereinaftermore fully set forth.

In the accompanying drawings I first roll the metal from which thefencing-strip is to be formed between fluted rolls until it is reducedto the proper size and of round form. I then pass the round bar or rodthrough a pair of rolls, a to, having oval grooves a a, rendering thebar oval in cross-section. The bar or rod is then passed through anotherpair of rolls, b I), provided with oval grooves cc, which have angularnotches or recesses d (I cut in their sides and lying directly oppositeeach other. The angular recesses d are cut in a V shape and taper to apoint, as shown in the drawings. In passing the steel or other metalthrough the rolls 1) b the metal is forced into the angular recesses d,thus forming spurs or barbs e on the oval rods at proper intervalsapart, which lie directly opposite each other and on opposite sides ofthe oval bar or rod. The oval rod, provided with spurs e, is then passedbetween the rolls h h, provided with flat square grooves z 6, wherebythe oval rod is flattened and reduced to the desired width andthickness. The strip and barbs are then trimmed and passed between apair of rolls, or. m, fluted longitudinally, or provided withlongitudinal grooves n a, which crimp or corrugate the strip and itsbarbs to strengthen 1 them and allow for contraction and expansion fromcold and heat. By this process it will be seen that a metallicfencing-strip, A, provided with opposite barbs, c, in the plane of thestrip, and projecting upwardly and downwardly from its upper and loweredges, and corrugated transversely, is cheaply and rapidly produced,forming a fencing-stripvin which the barbs form an integral part of thestrip, and are not liable to slip thereon, and the strip is corrugatedtransversely to strengthen it and allow for expansion and contractionfrom heat and cold.

What I claim as my invention is-- l. The combination of the rolls 1) I),provided with oval grooves c 0, having angular recesses d (I out intheir sides, and lying directly opposite each other, substantially asdescribed, and for the purpose set forth.

2. The process herein described of manufacturing metallic corrugatedbarbed fencingstrips, consisting in first passing a round bar or rodthrough a pair of rolls having oval grooves formed therein, then passingsaid bar or rod through a second pair of rolls provided with ovalgrooves having angular recesses cut in their sides, and lying directlyopposite each other, then passing the oval bar provided with spursbetween rolls provided with flat square grooves to flatten and reducethe thickness of the rod, then trimming the strip and its barbs, andfinally passing it through a pair of rolls grooved longitudinally,whereby the strip and its barbs are crimped or corrugated transversely,as set forth.

3. As an improved article of manufacture, the metallic fencing-strip A,corrugated transversely, and provided with opposite barbs in the planeof the strip and integral therewith, and projecting upwardly anddownwardly from its upper and lower edges, as and for the purposesspecified.

ALBERT O. J ENNIsoN, FRED MAXWELL.

